*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body{
	background: linear-gradient(135deg,#00A9F4, rgba(0,0,255,0.8));
	background-repeat: no-repeat;
	background-size: 100% 300%;
}

.app{
	padding: 10px;
	color: white;
}

.wrapper{
	padding: 0 40px;
}
.content{
	width: 100%;
	margin-top: 10px;
	padding: 10px;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	background-color: #FFCC33;
	border-radius: 15px;
}

.content .grid{
	width: calc(33% - 20px);
	height: 20vw;
	display: flex;
	justify-content: center;
	align-items: center;
	background-color: white;
	margin: 10px;
	border-radius: 5px;
	color: #CC6666;
	font-size: 1.0rem;
}

.content .select{
	border: 2px solid deepskyblue;
	background-color: #ffff00;
}

.content .start{
	background-color: #ee4400;
	color: white;
	font-size: 0.8rem;
}
.content .start:active{
	background-color: #ee7c1d
}

.app .explain{
	position: relative;
	margin-top: 30px;
	border-radius: 10px;
	background-color: #1447ff;
	padding-top: 25px;
	padding: 35px 10px 0 10px;
	line-height: 30px;
}

.app .explain .title{
	background-color: orange;
	height: 40px;
	width: 33vw;
	text-align: center;
	font-size: 20px;
	line-height: 40px;
	border-radius: 20px;
	position: absolute;
	left: 50%;
	top: 0px;
	transform: translate(-50%, -50%);
}